1 dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.13)dnl dnl Minimum Autoconf version required.
4 AC_INIT(include/features.h)
5 AC_CONFIG_HEADER(config.h)
6 AC_CONFIG_AUX_DIR(scripts)
8 # This will get text that should go into config.make.
11 # Check for a --with-gmp argument and set gmp-srcdir in config.make.
13 --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed),
16 yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;;
18 *) config_vars="$config_vars
19 gmp-srcdir = $withval" ;;
22 # Check for a --with-gettext argument and set gettext-srcdir in config.make.
23 AC_ARG_WITH(gettext, dnl
24 --with-gettext=DIR find GNU gettext source code in DIR (not needed),
26 case "$with_gettext" in
28 AC_MSG_ERROR(--with-gettext requires an argument; use --with-gettext=DIR) ;;
31 config_vars="$config_vars
32 gettext-srcdir = $withval" ;;
35 # Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
37 --with-gd=DIR find libgd include dir and library with prefix DIR,
41 *) libgd_include="-I$withval/include"
42 libgd_ldflags="-L$withval/lib" ;;
45 AC_ARG_WITH(gd-include, dnl
46 --with-gd-include=DIR find libgd include files in DIR,
48 case "$with_gd_include" in
50 *) libgd_include="-I$withval" ;;
53 AC_ARG_WITH(gd-lib, dnl
54 --with-gd-lib=DIR find libgd library files in DIR,
56 case "$with_gd_lib" in
58 *) libgd_ldflags="-L$withval" ;;
62 if test -n "$libgd_include"; then
63 config_vars="$config_vars
64 CFLAGS-memprofstat.c = $libgd_include"
66 if test -n "$libgd_ldflags"; then
67 config_vars="$config_vars
68 libgd-LDFLAGS = $libgd_ldflags"
71 dnl Arguments to specify presence of other packages/features.
73 [ --with-fp if using floating-point hardware [default=yes]],
74 with_fp=$withval, with_fp=yes)
75 AC_ARG_WITH(binutils, dnl
76 --with-binutils=PATH specify location of binutils (as and ld),
77 path_binutils=$withval, path_binutils='')
79 --with-elf if using the ELF object format,
82 [ --without-cvs if CVS should not be used],
83 with_cvs=$withval, with_cvs=yes)
86 AC_ARG_WITH(headers, dnl
87 [ --with-headers=PATH location of system headers to use
88 [e.g. /usr/src/linux/include]
89 [default=compiler default]],
90 sysheaders=$withval, sysheaders='')
92 AC_ARG_ENABLE(libio, dnl
93 [ --enable-libio build in GNU libio instead of GNU stdio],
94 [if test $enableval = yes; then
101 AC_ARG_ENABLE(sanity-checks, dnl
102 [ --disable-sanity-checks really do not use threads (should not be used
103 except in special situations) [default=yes]],
104 enable_sanity=$enableval, enable_sanity=yes)
106 dnl Arguments to enable or disable building the static, shared, profiled,
107 dnl and -fomit-frame-pointer libraries.
108 dnl I've disabled this for now since we cannot build glibc without static
109 dnl libraries built in the moment.
110 dnl AC_ARG_ENABLE(static, dnl
111 dnl [ --enable-static build static library [default=yes]],
112 dnl static=$enableval, static=yes)
114 AC_ARG_ENABLE(shared, dnl
115 [ --enable-shared build shared library [default=yes if GNU ld & ELF]],
116 shared=$enableval, shared=default)
117 AC_ARG_ENABLE(profile, dnl
118 [ --enable-profile build profiled library [default=yes]],
119 profile=$enableval, profile=yes)
120 AC_ARG_ENABLE(omitfp, dnl
121 [ --enable-omitfp build undebuggable optimized library [default=no]],
122 omitfp=$enableval, omitfp=no)
123 AC_ARG_ENABLE(bounded, dnl
124 [ --enable-bounded build with runtime bounds checking [default=no]],
125 bounded=$enableval, bounded=no)
126 AC_ARG_ENABLE(versioning, dnl
127 [ --disable-versioning do not include versioning information in the
128 library objects [default=yes if supported]],
129 enable_versioning=$enableval, enable_versioning=yes)
131 dnl Generic infrastructure for drop-in additions to libc.
132 AC_ARG_ENABLE(add-ons, dnl
133 [ --enable-add-ons[=DIR1,DIR2]...
134 configure and build add-ons in DIR1,DIR2,...
135 search for add-ons if no parameter given],
136 [case "$enableval" in
137 yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'`
138 test "$add_ons" = "*" && add_ons= ;;
139 *) add_ons=`echo "$enableval" | sed 's/,/ /g'`;;
143 AC_CONFIG_SUBDIRS($add_ons)
145 if test x"$add_ons" != x; then
146 for f in $add_ons; do
147 # Test whether such a subdir really exists.
148 if test -d $srcdir/$f; then
149 add_ons_pfx="$add_ons_pfx $f/"
151 AC_MSG_ERROR(add-on directory \"$f\" does not exist)
156 dnl On some platforms we cannot use dynamic loading. We must provide
157 dnl static NSS modules.
158 AC_ARG_ENABLE(static-nss, dnl
159 [ --enable-static-nss build static NSS modules [default=no]],
160 static_nss=$enableval, static_nss=no)
161 if test x"$static_nss" = xyes; then
162 AC_DEFINE(DO_STATIC_NSS)
165 AC_ARG_ENABLE(force-install,
166 [ --disable-force-install don't force installation of files from this package,
167 even if they are older than the installed files],
168 force_install=$enableval, force_install=yes)
169 AC_SUBST(force_install)
171 dnl On some platforms we allow dropping compatibility with all kernel
173 AC_ARG_ENABLE(kernel,
174 [ --enable-kernel=VERSION compile for compatibility with kernel not older
176 minimum_kernel=$enableval)
180 # The way shlib-versions is used to generate soversions.mk uses a
181 # fairly simplistic model for name recognition that can't distinguish
182 # i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
183 # of `gnu*' here to be `gnu-gnu*' just so that shlib-versions can
184 # tell. This doesn't get used much beyond that, so it's fairly safe.
189 host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
193 # We keep the original values in `$config_*' and never modify them, so we
194 # can write them unchanged into config.make. Everything else uses
195 # $machine, $vendor, and $os, and changes them whenever convenient.
196 config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
198 # Some configurations imply other options.
200 gnu* | linux* | bsd4.4* | netbsd* | freebsd*)
201 # These systems always use GNU tools.
202 gnu_ld=yes gnu_as=yes ;;
205 # i586-linuxaout is mangled into i586-pc-linux-gnuaout
206 linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
208 gnu* | linux* | sysv4* | solaris2* | irix6*)
209 # These systems (almost) always use the ELF format.
214 machine=$config_machine
215 vendor=$config_vendor
219 ### I put this here to prevent those annoying emails from people who cannot
220 ### read and try to compile glibc on unsupported platforms. --drepper
222 ### By using the undocumented --enable-hacker-mode option for configure
223 ### one can skip this test to make the configuration not fail for unsupported
226 if test -z "$enable_hacker_mode"; then
227 case "$machine-$host_os" in
228 *-linux* | *-gnu* | arm*-none*)
231 echo "*** The GNU C library is currently not available for this platform."
232 echo "*** So far nobody cared to port it and if there is no volunteer it"
233 echo "*** might never happen. So, if you have interest to see glibc on"
234 echo "*** this platform visit"
235 echo "*** http://www.gnu.org/software/libc/porting.html"
236 echo "*** and join the group of porters"
242 dnl We need to use [ and ] for other purposes for a while now.
244 # Expand the configuration machine name into a subdirectory by architecture
245 # type and particular chip.
247 a29k | am29000) base_machine=a29k machine=a29k ;;
248 alpha*) base_machine=alpha machine=alpha/$machine ;;
249 arm*) base_machine=arm machine=arm/$machine ;;
250 c3[012]) base_machine=cx0 machine=cx0/c30 ;;
251 c4[04]) base_machine=cx0 machine=cx0/c40 ;;
252 hppa*) base_machine=hppa machine=hppa/$machine ;;
253 i[3456]86) base_machine=i386 machine=i386/$machine ;;
254 m680?0) base_machine=m68k machine=m68k/$machine ;;
255 m68k) base_machine=m68k machine=m68k/m68020 ;;
256 m88???) base_machine=m88k machine=m88k/$machine ;;
257 m88k) base_machine=m88k machine=m88k/m88100 ;;
258 mips64*) base_machine=mips64 machine=mips/mips64/$machine ;;
259 mips*) base_machine=mips
261 IP22) machine=mips/mips3 ;;
262 *) machine=mips/$machine ;;
265 base_machine=sparc machine=sparc/sparc32 ;;
266 sparcv8 | supersparc | hypersparc)
267 base_machine=sparc machine=sparc/sparc32/sparcv8 ;;
268 sparcv8plus | sparcv8plusa | sparcv9)
269 base_machine=sparc machine=sparc/sparc32/sparcv9 ;;
270 sparc64 | ultrasparc)
271 base_machine=sparc machine=sparc/sparc64 ;;
274 AC_SUBST(base_machine)
276 if test "$base_machine" = "i386"; then
277 AC_DEFINE(USE_REGPARMS)
280 # Compute the list of sysdep directories for this configuration.
281 # This can take a while to compute.
282 sysdep_dir=$srcdir/sysdeps
283 AC_MSG_CHECKING(sysdep dirs)
284 dnl We need to use [ and ] for other purposes for a while now.
286 # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
287 os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
292 netbsd* | 386bsd* | freebsd* | bsdi*)
293 base_os=unix/bsd/bsd4.4 ;;
294 osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
296 sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
299 base_os=unix/sysv/irix6/$os ;;
301 base_os=unix/sysv/sysv4 ;;
303 base_os=unix/sysv/hpux/$os ;;
305 base_os=standalone ;;
310 # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
313 while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
317 o=`echo $tail | sed 's/[0-9]*$//'`
318 if test $o != $tail; then
321 # For linux-gnu, try linux-gnu, then linux.
322 o=`echo $tail | sed 's/-.*$//'`
323 if test $o != $tail; then
327 # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
330 while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
336 # For sparc/sparc32, try sparc/sparc32 and then sparc.
339 while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
341 # Prepend the machine's FPU directory unless --without-fp.
342 if test "$with_fp" = yes; then
349 dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
352 # Find what sysdep directories exist.
354 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
355 for d in $add_ons_pfx ''; do
356 for b in $base ''; do
357 for m0 in $mach ''; do
358 for v in /$vendor ''; do
359 test "$v" = / && continue
360 for o in /$ostry ''; do
361 test "$o" = / && continue
362 for m in $mach ''; do
363 if test "$m0$b$v$o$m"; then
364 try="${d}sysdeps$m0$b$v$o$m"
365 test -n "$enable_debug_configure" &&
366 echo "$0 [DEBUG]: try $try" >&2
367 if test -d $srcdir/$try; then
368 sysnames="$sysnames $try"
369 { test -n "$o" || test -n "$b"; } && os_used=t
370 { test -n "$m" || test -n "$m0"; } && machine_used=t
381 if test -z "$os_used" && test "$os" != none; then
382 AC_MSG_ERROR(Operating system $os is not supported.)
384 if test -z "$machine_used" && test "$machine" != none; then
385 AC_MSG_ERROR(The $machine is not supported.)
388 # We have now validated the configuration.
391 # If using ELF, look for an `elf' subdirectory of each machine directory.
392 # We prepend these rather than inserting them whereever the machine appears
393 # because things specified by the machine's ELF ABI should override
394 # OS-specific things, and should always be the same for any OS on the
395 # machine (otherwise what's the point of an ABI?).
396 if test "$elf" = yes; then
398 for d in $add_ons_pfx ''; do
400 if test -d $srcdir/${d}sysdeps$m/elf; then
401 elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
405 sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
409 # Expand the list of system names into a full list of directories
410 # from each element's parent name and Implies file (if present).
413 while test $# -gt 0; do
417 case " $names " in *" $name "*)
418 # Already in the list.
422 # Report each name as we discover it, so there is no long pause in output.
423 echo $ac_n "$name $ac_c" >&AC_FD_MSG
425 name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
429 *) xsrcdir=$srcdir/ ;;
431 test -n "$enable_debug_configure" &&
432 echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
434 if test -f $xsrcdir$name/Implies; then
435 # Collect more names from the `Implies' file (removing comments).
436 implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
438 for x in $implied_candidate; do
439 if test -d $xsrcdir$name_base/$x; then
440 implied="$implied $name_base/$x";
442 AC_MSG_WARN($name/Implies specifies nonexistent $x)
449 # Add NAME to the list of names.
452 # Find the parent of NAME, using the empty string if it has none.
454 parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
457 # Add the names implied by NAME, and NAME's parent (if it has one), to
458 # the list of names to be processed (the argument list). We prepend the
459 # implied names to the list and append the parent. We want implied
460 # directories to come before further directories inferred from the
461 # configuration components; this ensures that for sysv4, unix/common
462 # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
464 sysnames="`echo $implied $* $parent`"
465 test -n "$sysnames" && set $sysnames
468 # Add the default directories.
469 default_sysnames=sysdeps/generic
470 if test "$elf" = yes; then
471 default_sysnames="sysdeps/generic/elf $default_sysnames"
473 sysnames="$names $default_sysnames"
475 # The other names were emitted during the scan.
476 AC_MSG_RESULT($default_sysnames)
482 if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
483 # The makefiles need to use a different form to find it in $srcdir.
484 INSTALL='\$(..)./scripts/install-sh -c'
488 # These programs are version sensitive.
489 AC_REQUIRE([AC_CHECK_TOOL_PREFIX])dnl
490 AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
491 [version \([egcygnustp-]*[0-9.]*\)],
492 [egcs-2.9[1-9].*|egcs-2.90.2[789]|egcs-2.90.[3-9][0-9]|*gcc-2.9[1-9].*|pgcc-2.90.2[789]|pgcc-2.90.[3-9][0-9]|*2.8.[1-9]*|*2.9|*2.9.[0-9]*|2.9[5-9]*|cygnus-2.9[1-9].*|gcc-2.9[5-9]|gcc-2.1[0-9][0-9]],
494 AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
495 [GNU Make[^0-9]*\([0-9][0-9.]*\)],
496 [3.75 | 3.76.[1-9]* | 3.7[789]* | 3.[89]*], critic_missing=t)
498 AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
499 [GNU gettext.* \([0-9]*\.[0-9.]*\)],
500 [0.[1-9][0-9].* | [1-9].*], MSGFMT=: aux_missing=t)
501 AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
502 [GNU texinfo.* \([0-9][0-9.]*\)],
503 [3.1[1-9] | 3.[2-9][0-9] | 4.* | 1.6[89] | 1.7[0-9]], MAKEINFO=: aux_missing=t)
505 if test -n "$critic_missing"; then
507 *** Some critical program is missing or too old.
508 *** Check the INSTALL file for required versions.])
511 test -n "$aux_missing" && AC_MSG_WARN([
512 *** An auxiliary program is missing or too old;
513 *** some features will be disabled.
514 *** Check the INSTALL file for required versions.])
516 # glibcbug.in wants to know the compiler version.
517 CCVERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
522 if test $host != $build; then
523 AC_CHECK_PROGS(BUILD_CC, gcc cc)
525 AC_SUBST(cross_compiling)
528 AC_CHECK_TOOL(MIG, mig)
530 # if using special system headers, find out the compiler's sekrit
531 # header directory and add that to the list. NOTE: Only does the right
532 # thing on a system that doesn't need fixincludes. (Not presently a problem.)
533 if test -n "$sysheaders"; then
534 ccheaders=`$CC -print-file-name=include`
535 SYSINCLUDES="-nostdinc -isystem $ccheaders -isystem $sysheaders"
537 AC_SUBST(SYSINCLUDES)
539 # check if ranlib is necessary
540 AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl
541 cat > conftest.c <<EOF
546 $CC $CFLAGS -c conftest.c
547 $AR cr conftest.a conftest.c
548 cp conftest.a conftest2.a
550 if cmp -s conftest.a conftest2.a; then
551 libc_cv_ranlib_necessary=no
553 libc_cv_ranlib_necessary=yes
556 if test "$libc_cv_ranlib_necessary" = no; then
560 # Test if LD_LIBRARY_PATH contains the notation for the current directory
561 # since this would lead to problems installing/building glibc.
562 # LD_LIBRARY_PATH contains the current directory if one of the following
564 # - one of the terminals (":" and ";") is the first or last sign
565 # - two terminals occur directly after each other
566 # - the path contains an element with a dot in it
567 AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
569 case ${LD_LIBRARY_PATH} in
570 [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
571 ld_library_path_setting="contains current directory"
574 ld_library_path_setting="ok"
578 AC_MSG_RESULT($ld_library_path_setting)
579 if test "$ld_library_path_setting" != "ok"; then
581 *** LD_LIBRARY_PATH shouldn't contain the current directory when
582 *** building glibc. Please change the environment variable
583 *** and run configure again.])
586 AC_PATH_PROG(BASH, bash, no)
587 if test "$BASH" != no &&
588 $BASH -c 'test "$BASH_VERSINFO" \
589 && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then
590 libc_cv_have_bash2=yes
592 libc_cv_have_bash2=no
594 AC_SUBST(libc_cv_have_bash2)
596 dnl We need a ksh compatible shell for tzselect.
597 if test "$BASH" = no; then
598 AC_PATH_PROG(KSH, ksh, no)
599 if test "$KSH" = no; then
609 AC_SUBST(libc_cv_have_ksh)
612 AC_PATH_PROG(PERL, perl, no)
614 AC_PATH_PROG(INSTALL_INFO, install-info, no,
615 $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
616 AC_SUBST(INSTALL_INFO)
617 if test "$INSTALL_INFO" != "no"; then
618 AC_CACHE_CHECK(for old Debian install-info, libc_cv_old_debian_install_info,
620 # There is a hard ^_ on the next line. I am open to better ideas.
622 echo 'File: dir Node: Top This is the top of the INFO tree'
623 echo '* Menu:') >conftest.d/dir
624 (echo 'INFO-DIR-SECTION i-d-s works'
625 echo 'START-INFO-DIR-ENTRY'
626 echo '* Prog: (prog). Program.'
627 echo 'END-INFO-DIR-ENTRY') >conftest.d/prog.info
628 if $INSTALL_INFO --info-dir=conftest.d conftest.d/prog.info >&AC_FD_CC 2>&1
630 if grep -s 'i-d-s works' conftest.d/dir >/dev/null
631 then libc_cv_old_debian_install_info=no
632 else libc_cv_old_debian_install_info=yes
634 else libc_cv_old_debian_install_info=no testfailed=t
637 if test -n "$testfailed"
638 then AC_MSG_WARN([install-info errored out, check config.log])
640 OLD_DEBIAN_INSTALL_INFO=$libc_cv_old_debian_install_info
642 AC_SUBST(OLD_DEBIAN_INSTALL_INFO)
644 AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl
645 echo '#include <stddef.h>
646 FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c
647 if eval "$ac_cpp conftest.c 2>/dev/null" \
648 | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then
649 libc_cv_signed_size_t=no
651 libc_cv_signed_size_t=yes
654 if test $libc_cv_signed_size_t = yes; then
655 dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings.
656 cat >> confdefs.h <<\EOF
658 #define __SIZE_TYPE__ unsigned
662 AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl
664 [#define __need_size_t
665 #define __need_wchar_t
668 #include <stddef.h>], [size_t size; wchar_t wchar;
670 #error stddef.h ignored __need_*
672 if (&size == NULL || &wchar == NULL) abort ();],
673 libc_cv_friendly_stddef=yes,
674 libc_cv_friendly_stddef=no)])
675 if test $libc_cv_friendly_stddef = yes; then
676 config_vars="$config_vars
677 override stddef.h = # The installed <stddef.h> seems to be libc-friendly."
680 AC_CACHE_CHECK(whether we need to use -P to assemble .S files,
681 libc_cv_need_minus_P, [dnl
682 cat > conftest.S <<EOF
683 #include "confdefs.h"
684 /* Nothing whatsoever. */
686 if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then
687 libc_cv_need_minus_P=no
689 libc_cv_need_minus_P=yes
692 if test $libc_cv_need_minus_P = yes; then
693 config_vars="$config_vars
694 asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
697 AC_MSG_CHECKING(whether .text pseudo-op must be used)
698 AC_CACHE_VAL(libc_cv_dot_text, [dnl
699 cat > conftest.s <<EOF
703 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
704 libc_cv_dot_text=.text
707 if test -z "$libc_cv_dot_text"; then
713 AC_CACHE_CHECK(for assembler global-symbol directive,
714 libc_cv_asm_global_directive, [dnl
715 libc_cv_asm_global_directive=UNKNOWN
716 for ac_globl in .globl .global .EXPORT; do
717 cat > conftest.s <<EOF
722 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
723 libc_cv_asm_global_directive=${ac_globl}
726 test $libc_cv_asm_global_directive != UNKNOWN && break
728 if test $libc_cv_asm_global_directive = UNKNOWN; then
729 AC_MSG_ERROR(cannot determine asm global directive)
731 AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive})
734 AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
735 cat > conftest.s <<EOF
738 .set glibc_conftest_frobozz,foo
739 $libc_cv_asm_global_directive glibc_conftest_frobozz
741 # The alpha-dec-osf1 assembler gives only a warning for `.set'
742 # (but it doesn't work), so we must do a linking check to be sure.
743 cat > conftest1.c <<\EOF
744 extern int glibc_conftest_frobozz;
745 main () { printf ("%d\n", glibc_conftest_frobozz); }
747 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
748 -o conftest conftest.s conftest1.c 1>&AC_FD_CC 2>&AC_FD_CC; then
749 libc_cv_asm_set_directive=yes
751 libc_cv_asm_set_directive=no
754 if test $libc_cv_asm_set_directive = yes; then
755 AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
758 AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
759 [cat > conftest.s <<EOF
762 .symver _sym,sym@VERS
764 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
765 libc_cv_asm_symver_directive=yes
767 libc_cv_asm_symver_directive=no
770 AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
771 if test $libc_cv_asm_symver_directive = yes; then
772 cat > conftest.s <<EOF
775 .symver _sym,sym@VERS
777 cat > conftest.map <<EOF
786 if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
787 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -shared -o conftest.so conftest.o
788 -nostartfiles -nostdlib
789 -Wl,--version-script,conftest.map
792 libc_cv_ld_version_script_option=yes
794 libc_cv_ld_version_script_option=no
797 libc_cv_ld_version_script_option=no
800 libc_cv_ld_version_script_option=no
803 if test $libc_cv_asm_symver_directive = yes &&
804 test $libc_cv_ld_version_script_option = yes &&
805 test $enable_versioning = yes; then
807 AC_DEFINE(DO_VERSIONING)
813 if test $VERSIONING = no; then
815 *** WARNING: You should not compile GNU libc without versioning. Not using
816 *** versioning will introduce incompatibilities so that old binaries
817 *** will not run anymore.
818 *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)."
820 if test $elf = yes; then
821 AC_CACHE_CHECK(for .previous assembler directive,
822 libc_cv_asm_previous_directive, [dnl
823 cat > conftest.s <<EOF
827 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
828 libc_cv_asm_previous_directive=yes
830 libc_cv_asm_previous_directive=no
833 if test $libc_cv_asm_previous_directive = yes; then
834 AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
836 AC_CACHE_CHECK(for .popsection assembler directive,
837 libc_cv_asm_popsection_directive, [dnl
838 cat > conftest.s <<EOF
839 .pushsection foo_section
842 if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
843 libc_cv_asm_popsection_directive=yes
845 libc_cv_asm_popsection_directive=no
848 if test $libc_cv_asm_popsection_directive = yes; then
849 AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
854 if test $elf != yes; then
855 AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini,
856 [AC_TRY_COMPILE(, [asm (".section .init");
857 asm (".section .fini");
858 asm ("${libc_cv_dot_text}");],
859 libc_cv_have_initfini=yes,
860 libc_cv_have_initfini=no)])
861 AC_SUBST(libc_cv_have_initfini)dnl
862 if test $libc_cv_have_initfini = yes; then
863 AC_DEFINE(HAVE_INITFINI)
867 dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
868 AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
869 [cat > conftest.$ac_ext <<EOF
870 dnl This sometimes fails to find confdefs.h, for some reason.
871 dnl [#]line __oline__ "[$]0"
872 [#]line __oline__ "configure"
873 #include "confdefs.h"
874 void underscore_test(void) {
877 if AC_TRY_EVAL(ac_compile); then
878 if grep _underscore_test conftest* >/dev/null; then
879 ifelse([$1], , :, [rm -f conftest*
882 ifelse([$2], , , [rm -f conftest*
886 echo "configure: failed program was:" >&AC_FD_CC
887 cat conftest.$ac_ext >&AC_FD_CC
888 ifelse([$2], , , [rm -f conftest*
893 if test $elf = yes; then
894 libc_cv_asm_underscores=no
896 if test $ac_cv_prog_cc_works = yes; then
897 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
898 [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
899 libc_cv_asm_underscores=yes,
900 libc_cv_asm_underscores=no)])
902 AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
903 [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
904 libc_cv_asm_underscores=no)])
907 if test $libc_cv_asm_underscores = no; then
908 AC_DEFINE(NO_UNDERSCORES)
911 if test $elf = yes; then
912 libc_cv_weak_symbols=yes
915 AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive,
917 cat > conftest.s <<EOF
919 ${libc_cv_asm_global_directive} foo
924 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
925 libc_cv_asm_weak_directive=yes
927 libc_cv_asm_weak_directive=no
931 if test $libc_cv_asm_weak_directive = no; then
932 AC_CACHE_CHECK(for assembler .weakext directive,
933 libc_cv_asm_weakext_directive,
935 cat > conftest.s <<EOF
937 ${libc_cv_asm_global_directive} foo
941 ${libc_cv_asm_global_directive} baz
944 if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
945 libc_cv_asm_weakext_directive=yes
947 libc_cv_asm_weakext_directive=no
953 if test $libc_cv_asm_weak_directive = yes; then
954 AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE)
955 elif test $libc_cv_asm_weakext_directive = yes; then
956 AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE)
959 AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl
960 cat > conftest.c <<\EOF
965 dnl No \ in command here because it ends up inside ''.
966 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
967 -nostdlib -nostartfiles -Wl,--no-whole-archive
968 -o conftest conftest.c 1>&AC_FD_CC]); then
969 libc_cv_ld_no_whole_archive=yes
971 libc_cv_ld_no_whole_archive=no
974 if test $libc_cv_ld_no_whole_archive = yes; then
975 no_whole_archive=-Wl,--no-whole-archive
977 AC_SUBST(no_whole_archive)dnl
979 AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl
980 cat > conftest.c <<\EOF
985 dnl No \ in command here because it ends up inside ''.
986 if AC_TRY_COMMAND([${CC-cc} $CFLAGS
987 -nostdlib -nostartfiles -fexceptions
988 -o conftest conftest.c 1>&AC_FD_CC]); then
989 libc_cv_gcc_exceptions=yes
991 libc_cv_gcc_exceptions=no
994 if test $libc_cv_gcc_exceptions = yes; then
995 exceptions=-fexceptions
997 AC_SUBST(exceptions)dnl
999 if test "$base_machine" = alpha ; then
1000 AC_CACHE_CHECK(for function ..ng prefix, libc_cv_gcc_alpha_ng_prefix, [dnl
1001 cat > conftest.c <<\EOF
1005 if AC_TRY_COMMAND([${CC-cc} -S conftest.c -o - | fgrep "\$foo..ng" > /dev/null]);
1007 libc_cv_gcc_alpha_ng_prefix=yes
1009 libc_cv_gcc_alpha_ng_prefix=no
1012 if test $libc_cv_gcc_alpha_ng_prefix = yes ; then
1013 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "$")
1015 AC_DEFINE(ASM_ALPHA_NG_SYMBOL_PREFIX, "")
1019 if test "$host_cpu" = powerpc ; then
1020 # Check for a bug present in at least versions 2.8.x of GCC
1021 # and versions 1.0.x of EGCS.
1022 AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl
1023 AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],,
1024 libc_cv_c_asmcr0_bug='no',
1025 libc_cv_c_asmcr0_bug='yes')])
1026 if test "$libc_cv_c_asmcr0_bug" != 'no'; then
1027 AC_DEFINE(BROKEN_PPC_ASM_CR0)
1031 AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info,
1032 [cat > conftest.c <<EOF
1033 #line __oline__ "configure"
1034 static char __EH_FRAME_BEGIN__[];
1037 #ifdef CHECK__register_frame
1038 __register_frame (__EH_FRAME_BEGIN__);
1039 __deregister_frame (__EH_FRAME_BEGIN__);
1041 #ifdef CHECK__register_frame_info
1042 __register_frame_info (__EH_FRAME_BEGIN__);
1043 __deregister_frame_info (__EH_FRAME_BEGIN__);
1048 /* FIXME: this is fragile. */
1058 dnl No \ in command here because it ends up inside ''.
1059 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame_info
1060 -nostdlib -nostartfiles
1061 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1062 libc_cv_gcc_dwarf2_unwind_info=static
1064 libc_cv_gcc_dwarf2_unwind_info=no
1066 if test $libc_cv_gcc_dwarf2_unwind_info = no; then
1067 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -DCHECK__register_frame
1068 -nostdlib -nostartfiles
1069 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1070 libc_cv_gcc_dwarf2_unwind_info=yes
1072 libc_cv_gcc_dwarf2_unwind_info=no
1076 case $libc_cv_gcc_dwarf2_unwind_info in
1078 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1081 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO)
1082 AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC)
1086 dnl Check whether compiler understands __builtin_expect.
1087 AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
1088 [cat > conftest.c <<EOF
1089 #line __oline__ "configure"
1092 a = __builtin_expect (a, 10);
1093 return a == 10 ? 0 : 1;
1096 dnl No \ in command here because it ends up inside ''.
1097 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1098 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1099 libc_cv_gcc_builtin_expect=yes
1101 libc_cv_gcc_builtin_expect=no
1104 if test "$libc_cv_gcc_builtin_expect" = yes; then
1105 AC_DEFINE(HAVE_BUILTIN_EXPECT)
1108 dnl Check whether the compiler supports subtraction of local labels.
1109 AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels,
1110 [cat > conftest.c <<EOF
1112 #line __oline__ "configure"
1115 static const int ar[] = { &&l1 - &&l1, &&l2 - &&l1 };
1116 void *p = &&l1 + ar[a];
1125 dnl No \ in command here because it ends up inside ''.
1126 if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
1127 -o conftest conftest.c -lgcc >&AC_FD_CC]); then
1128 libc_cv_gcc_subtract_local_labels=yes
1130 libc_cv_gcc_subtract_local_labels=no
1133 if test "$libc_cv_gcc_subtract_local_labels" = yes; then
1134 AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS)
1137 dnl Check whether we have the gd library available.
1138 AC_MSG_CHECKING(for libgd)
1139 old_CFLAGS="$CFLAGS"
1140 CFLAGS="$CFLAGS $libgd_include"
1141 old_LDFLAGS="$LDFLAGS"
1142 LDFLAGS="$LDFLAGS $libgd_ldflags"
1144 LIBS="$LIBS -lgd -lpng -lz"
1145 AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
1146 CFLAGS="$old_CFLAGS"
1147 LDFLAGS="$old_LDFLAGS"
1149 AC_MSG_RESULT($LIBGD)
1152 ### End of automated tests.
1153 ### Now run sysdeps configure fragments.
1155 # sysdeps configure fragments may set these with files to be linked below.
1159 # They also can set these variables.
1160 ldd_rewrite_script=no
1162 # Iterate over all the sysdep directories we will use, running their
1163 # configure fragments, and looking for a uname implementation.
1165 for dir in $sysnames; do
1168 *) dest=$srcdir/$dir ;;
1170 if test -r $dest/configure; then
1171 AC_MSG_RESULT(running configure fragment for $dest)
1175 if test -z "$uname"; then
1176 if test -r $dest/uname.c ||
1177 test -r $dest/uname.S ||
1178 { test -r $dest/syscalls.list &&
1179 grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then
1186 AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`)
1188 # If we will use the generic uname implementation, we must figure out what
1189 # it will say by examining the system, and write the results in config-name.h.
1190 if test "$uname" = "sysdeps/generic"; then
1193 uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'`
1195 if test $uname_sysname != $config_os; then
1196 config_release=`echo $config_os | sed s/$uname_sysname//`
1199 AC_DEFUN(LIBC_KERNEL_ID, [dnl
1200 if test -r /vmunix; then
1201 kernel_id=`strings /vmunix | grep UNIX`
1202 elif test -r /dynix; then
1203 kernel_id=`strings /dynix | grep DYNIX`
1209 AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl
1210 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1212 kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'`
1214 if test x`echo "$config_release" | sed "s/^$kernel_release//"` \
1215 != x$config_release; then
1216 # The configuration release is a substring of the kernel release.
1217 libc_cv_uname_release=$kernel_release
1218 elif test x$config_release != x; then
1219 libc_cv_uname_release=$config_release
1220 elif test x$kernel_release != x; then
1221 libc_cv_uname_release=$kernel_release
1223 libc_cv_uname_release=unknown
1225 uname_release="$libc_cv_uname_release"
1227 AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl
1228 AC_REQUIRE([LIBC_KERNEL_ID])dnl
1230 kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'`
1232 if test -n "$kernel_version"; then
1233 libc_cv_uname_version="$kernel_version"
1235 libc_cv_uname_version=unknown
1237 uname_version="$libc_cv_uname_version"
1239 AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl
1240 config_uname=config-name.h:config-name.in
1242 # For non-generic uname, we don't need to create config-name.h at all.
1246 AC_MSG_CHECKING(stdio selection)
1249 libio) AC_DEFINE(USE_IN_LIBIO) ;;
1250 default) stdio=stdio ;;
1252 AC_MSG_RESULT($stdio)
1254 # Test for old glibc 2.0.x headers so that they can be removed properly
1255 # Search only in includedir.
1256 AC_MSG_CHECKING(for old glibc 2.0.x headers)
1257 if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h"
1259 old_glibc_headers=yes
1261 old_glibc_headers=no
1263 AC_MSG_RESULT($old_glibc_headers)
1264 if test ${old_glibc_headers} = yes; then
1265 AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will)
1266 AC_MSG_WARN(*** be removed.)
1268 AC_SUBST(old_glibc_headers)
1270 AC_SUBST(libc_cv_slibdir)
1271 AC_SUBST(libc_cv_sysconfdir)
1272 AC_SUBST(libc_cv_rootsbindir)
1274 AC_SUBST(has_ldconfig)
1275 AC_SUBST(ldd_rewrite_script)
1277 AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf)
1278 if test $gnu_ld = yes; then
1279 AC_DEFINE(HAVE_GNU_LD)
1281 if test $gnu_as = yes; then
1282 AC_DEFINE(HAVE_GNU_AS)
1284 if test $elf = yes; then
1290 if test $shared = default; then
1291 if test $gnu_ld = yes; then
1294 # For now we do not assume shared libs are available. In future more
1295 # tests might become available.
1300 AC_CACHE_CHECK([whether -fPIC is default], pic_default,
1302 cat > conftest.c <<EOF
1303 #if defined __PIC__ || defined __pic__ || defined PIC || defined pic
1304 # error PIC is default.
1307 if eval "${CC-cc} -S conftest.c 2>&AC_FD_CC 1>&AC_FD_CC"; then
1311 AC_SUBST(pic_default)
1316 AC_SUBST(static_nss)
1317 AC_SUBST(nopic_initfini)
1322 *door*) linux_doors=yes ;;
1323 *) linux_doors=no ;;
1325 AC_SUBST(linux_doors)
1327 if test "`(cd $srcdir; pwd)`" = "`pwd`"; then
1330 config_makefile=Makefile
1333 VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
1334 RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
1338 echo '*** Do NOT install this release on any production system!'
1339 echo '*** It is known to be broken and will be so for quite some time.'
1340 echo '*** Use the latest released version instead.'
1342 AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, [
1343 case $CONFIG_FILES in *config.make*)
1344 echo "$config_vars" >> config.make;;
1346 test -d bits || mkdir bits], [config_vars='$config_vars'])